UniFi Access Application - Authentication Bypass (CVE-2025-52665)
Description
A malicious actor with access to the management network could exploit a misconfiguration in UniFi’s door access application, UniFi Access, that exposed a management API without proper authentication. This vulnerability was introduced in Version 3.3.22 and was fixed in Version 4.0.21 and later.
Affected Products: UniFi Access Application (Version 3.3.22 through 3.4.31).
Mitigation: Update your UniFi Access Application to Version 4.0.21 or later.
psychologyCrowdSec Analysis
CVE-2025-52665 is a critical vulnerability in Ubiquiti's UniFi Access Application that allows attackers with management network access to exploit an unauthenticated management API, potentially leading to full system compromise. This flaw, present in versions 3.3.22 through 3.4.31, could enable remote attackers to gain unauthorized control over door access systems, posing significant risks to physical security.
CrowdSec has been tracking this vulnerability and its exploits since 19th of November 2025.
CrowdSec has not observed any significant exploitation activity targeting CVE-2025-52665 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.
Attackers exploit this vulnerability by sending unauthenticated requests to management API endpoints such as /api/ucore/backup/export on port 9780, allowing unauthorized access to sensitive management functions. These exploitation attempts typically originate from within the management network and do not require valid credentials.
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| Event | Date |
|---|---|
| CVE Published | 2025-10-30 |
| Rule Released | 2025-11-19 |
| CrowdSec First Seen | 2026-01-16 |